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lilihurry

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lilihurry(feixiaolin´ú·¢): ½ð±Ò+5 2014-05-11 20:52:12
´ËÇÐÏßµÄбÂÊk=y'^sub(x=1)=1/[2*sqrt(1)]=1/2
ÇÐÏß·½³Ì£ºy-1=1/2*£¨x-1)
ÕûÀíºóµÃ£ºy=x/2+1/2
(1)S=Integral{[x/2+1/2--Sqrt(x)]*dx,0,1}
=1/12
(2)V=Integral{¦Ð*{(x/2+1/2)^2--[Sqrt(x)]^2}*dx,0,1}
=¦Ð/12
2Â¥2014-04-21 14:38:46
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